splitter: 1.1.0 - Input/Output is expected/read as JSON

[demos/kafka/wordcount] / src / test / java / de / juplo / kafka / wordcount / splitter / SplitterApplicationTests.java

diff --git a/src/test/java/de/juplo/kafka/wordcount/splitter/SplitterApplicationTests.java b/src/test/java/de/juplo/kafka/wordcount/splitter/SplitterApplicationTests.java
new file mode 100644 (file)
index 0000000..9b1960f
--- /dev/null
+++ b/src/test/java/de/juplo/kafka/wordcount/splitter/SplitterApplicationTests.java
@@ -0,0 +1,97 @@
+package de.juplo.kafka.wordcount.splitter;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.kafka.annotation.KafkaListener;
+import org.springframework.kafka.core.KafkaTemplate;
+import org.springframework.kafka.test.context.EmbeddedKafka;
+
+import java.time.Duration;
+import java.util.LinkedList;
+import java.util.List;
+
+import static de.juplo.kafka.wordcount.splitter.SplitterApplicationTests.*;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.awaitility.Awaitility.*;
+
+
+@SpringBootTest(
+               properties = {
+                               "spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}",
+                               "juplo.wordcount.splitter.bootstrap-server=${spring.embedded.kafka.brokers}",
+                               "juplo.wordcount.splitter.input-topic=" + TOPIC_IN,
+                               "juplo.wordcount.splitter.output-topic=" + TOPIC_OUT })
+@EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT }, partitions = PARTITIONS)
+@Slf4j
+public class SplitterApplicationTests
+{
+       public final static String TOPIC_IN = "in";
+       public final static String TOPIC_OUT = "out";
+       static final int PARTITIONS = 2;
+
+       @Autowired
+       KafkaTemplate<String, String> kafkaTemplate;
+       @Autowired
+       ObjectMapper mapper;
+       @Autowired
+       Consumer consumer;
+
+
+       @BeforeEach
+       public void clear()
+       {
+               consumer.received.clear();
+       }
+
+
+       @Test
+       void testSendMessage() throws Exception
+       {
+               Recording recording = new Recording();
+               recording.setUser("peter");
+               recording.setSentence("Hallo Welt!");
+               kafkaTemplate.send(TOPIC_IN, mapper.writeValueAsString(recording));
+
+               String word1 = mapper.writeValueAsString(Word.of("peter", "Hallo"));
+               String word2 = mapper.writeValueAsString(Word.of("peter", "Welt"));
+
+               await("Expexted converted data")
+                               .atMost(Duration.ofSeconds(5))
+                               .untilAsserted(() ->
+                               {
+                                       assertThat(consumer.received).hasSize(2);
+                                       assertThat(consumer.received.get(0).value()).isEqualTo(word1);
+                                       assertThat(consumer.received.get(1).value()).isEqualTo(word2);
+                               });
+       }
+
+
+       static class Consumer
+       {
+               final List<ConsumerRecord<String, String>> received = new LinkedList<>();
+
+               @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
+               public void receive(ConsumerRecord<String, String> record)
+               {
+                       log.debug("Received message: {}", record);
+                       received.add(record);
+               }
+       }
+
+       @TestConfiguration
+       static class Configuration
+       {
+               @Bean
+               Consumer consumer()
+               {
+                       return new Consumer();
+               }
+       }
+}